Taylor Swift gave a surprise performance alongside Hayley Kiyoko at Jack Antonoff's annual Ally Coalition benefit concert which raises funds for the LGBTQ youth organization.Swift took the stage on Wednesday and joined Kiyoko for an acoustic version of "Delicate."Fan video taken during the performance feature Swift and Kiyoko jamming out to the track together while Swift strums a guitar."It's so great to be at this incredible show," Swift said before praising Kiyoko. "Hayley is killing it."Regina Spektor and Lana Del Rey also performed at the event. Antonoff was a producer on Swift's Reputation album which featured "Delicate."Swift made headlines in November when she inked a new record deal with Republic Records and Universal Music Group after her deal with Big Machine Records expired.